A tour group walks past a memorial wreath displayed next to the bronze memorial bust, by Robert Berks, of Kennedy in the grand foyer of the John F. Kennedy Center for the Performing Arts in Washington.

A Japanese TV crew gives a report next to a portrait of Kennedy at a memorial venue specially set for his Japanese fans in Tokyo.

Tatiana Schlossberg, granddaughter of John F. Kennedy, lays a wreath at his memorial at Runnymede, England.

Flowers adorn the gravesite stones of President Kennedy Nov. 22, 2013, a day that marks the 50 year following his death, at Arlington National Cemetery in Arlington, Va.

M.Scott Mahaskey/POLITICO

Former JFK aide visits grave

Carmella LaSpada, White House Special Projects Aide to President John F. Kennedy, prays at the gravesite of President Kennedy Nov. 22, 2013, a day that marks the 50 year following his death, at Arlington National Cemetery in Arlington, Va.

Flowers adorn the gravesite stones of President Kennedy Nov. 22, 2013, a day that marks the 50 year following his death, at Arlington National Cemetery in Arlington, Va.

M.Scott Mahaskey/POLITICO

Visitors gather at the gravesite of President Kennedy Nov. 22, 2013, a day that marks the 50 year following his death, at Arlington National Cemetery in Arlington, Va.